Gene mutations can be passed on to future generations and drive natural selection. ... Gene mutations can be helpful, harmful, or neutral for an organism's survival. Only mutations that are helpful in the organism's environment would influence its survival and reproduction
Each genus of organisms is divided into classes. This kingdom is the only kingdom of eukaryotes that contains both autotrophs and heterotrophs and unicellular and multicellular organisms. ... An owl and a bat share the same kingdom and phylum; an owl and a robin share the same kingdom, phylum, and class.
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